Method for controlling self-adpative sliding mode of single-phase SAPF (Shunt Active Power Filter)

An adaptive sliding mode, source filter technology, applied in active power filtering, harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problem of less research on active filters

Inactive Publication Date: 2012-10-03
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0004] At present, there are many studies on active filters controlled by three-phase electric compensation, but there are relatively few studies on active filt

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  • Method for controlling self-adpative sliding mode of single-phase SAPF (Shunt Active Power Filter)
  • Method for controlling self-adpative sliding mode of single-phase SAPF (Shunt Active Power Filter)
  • Method for controlling self-adpative sliding mode of single-phase SAPF (Shunt Active Power Filter)

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Embodiment Construction

[0101] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0102] 1. Selection of actual parameters

[0103] According to the derivation process of the SAPF approximate dynamic model, an adaptive sliding mode control model based on the adaptive sliding mode theory is established, such as figure 1 As shown, at the equilibrium point (x 0 , u 0 ) near x δ =x-x 0 , u δ =u-u 0 , where x is the actual output matrix of APF, x 0 Is the balance point (a matrix composed of inductor current and DC voltage at balance), and the simulation variable x δ , u are respectively obtained by the following formula

[0104] x δ = x - ...

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Abstract

The invention discloses a method for controlling a self-adpative sliding mode of a single-phase SAPF (Shunt Active Power Filter), which belongs to the technical field for controlling an active filter. A similar linear dynamic model based on an SAPF is controlled by utilizing a self-adaptive sliding mode theory, a self-adaptive rule which overcomes the phenomena of uncertain parameters and unknown upper limit of external disturbance is built, and a self-adaptive sliding mode controller is designed so that the SAPF can output current for compensating circuit harmonic wave, reactive power and the like. The error between the harmonic wave and the inductive current can be selected to be an input value of the self-adaptive sliding mode controller when in actual work, an optional value from 0 to 1 can be output by the controller at the moment and is transformed into a PWM (Pulse-Width Modulation) pulse in a certain way, the control for an APF (Active Power Filter) can be realized, and thus the current such as the harmonic wave can be compensated. Through a simulation experiment, the self-adaptive sliding mode controller can improve the non-linear current distortion within the national standard and has good economic significance and market prospect.

Description

technical field [0001] The invention relates to a single-phase parallel active filter adaptive sliding mode control method, which belongs to the technical field of active filter control. Background technique [0002] With the rapid development of the national economy and the wide application of power electronics technology, various nonlinear interference loads increase rapidly, resulting in a rapid increase in the harmonic current content in the power system, serious distortion of the current waveform, greatly reducing the power quality and increasing the line load. The power factor of the system decreases sharply, which poses a potential threat to the safety, stability and economic operation of electrical equipment, and has a great impact on the surrounding electrical environment. [0003] The design and research of active filters at home and abroad have made great progress, and a large number of products have been put into the market and achieved success. With the rapid d...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/40Y02E40/22Y02E40/20
Inventor 费峻涛张生磊戴卫力
Owner HOHAI UNIV CHANGZHOU
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